RESUMEN
Objective By participating in the process of drug treatment and pharmaceutical monitoring for a patient with cancer pain, clinical pharmacists participated in formulating drug treatment plans and proposed rational medication recommendations. At the same time, patients were given health education to reduce or avoid adverse drug reactions. Methods Pharmacists participate in the process of pharmacy monitoring of patients by participating in the review of prescriptions, discovering problems, intervening in time for improper prescriptions, communicating with doctors, changing medication plans, and providing health education to patients. Results Physicians accepted the suggestions of pharmacists and modified the medication regimen. The patient's condition improved. Conclusion The pharmacist participated in the intervention of an improperly prescribed medication for a patient with metastatic breast cancer postoperative cancer pain, and gave the patient a full range of pharmaceutical care, which reflects the importance of the pharmacist in pharmaceutical care.